1. Preheat oven to 400°F and line 2 large baking sheets with parchment paper. Slice potatoes as thinly as possible and place in a medium bowl with 1/4 cup (4 tbsp.) truffle oil; toss with your hands to coat well.

2. Place half the potatoes in a single layer on 2 large parchment-lined baking sheets and sprinkle with the Parmesan cheese and 1 tbsp. truffle oil; season lightly with salt and pepper.

3. Cook for 20 to 25 minutes, turning once or twice, removing any chips that are browned (some may cook faster than others). Repeat with remaining potatoes, cheese, salt, pepper and truffle oil. Re-crisp in a hot oven for a few minutes, if necessary.